Leah Remini (King of Queens) has a pretty neat voice. She is also quite cute.
There are more, but that is the only one comes to mind currently.
I'm a big fan of people that have nice laughs. Kinda sporadic with that comment, but I figured I owed another line of text.
EDIT: Heh, I just realized what forum this is in.
Musically, the lead singer of Nickelback has a unique voice. It's kind of raspy (??), but I think his voice certainly adds to the song.
Female-wise, Shania Twain has a great voice. The yelps she does are also very nice.
Also, Elmer Fudd at the beginning of the pre-release version of Master P's, "Them Jeans."
Ok, I'm done.